Lec 3 Flashcards
Diseases that affect the TMJ.
Arthritis
Fibromyalgia
Used to indicate where the pain is.
Pain drawing.
T/F : Each body site marked with pain increases the risk of developing another pain disorder as well as for chronic pain.
True
The more areas that a person marks as painful, the greater their chance of getting this.
TMD
Can prescribe these if pain scale is high.
Pain meds or muscle relaxants.
Where does electrical pain come from?
Nerves
Dull pain comes from where?
Muscles
Sharp pain is from where?
Joint/arthritis
Musculoskeletal pain lasts for how long?
Hours
Nerve pain lasts for how long?
Seconds
TMD NEVER causes this.
Fever
Associated sign with TMD and headaches.
Blurred vision
Closed lock
Cannot open anymore
Locked with an open mouth.
Open lock
In TMD screening, this movement is added to horizontal movement to get the total horizontal movement for the patient.
Protrusive movement
Open your mouth as far as you can without increasing your existing pain.
Measured from middle of #8 to the incisal edge of the mandibular central incisor.
Pain Free Opening
Open as much as you can, even if it’s painful.
Maximum unassisted opening
You force the mouth open.
Maximum Assisted Opening
T/F:
If pain free opening is 25, Max unassisted opening is 29, and max assisted opening is 30, it’s the joint that’s the problem, not the muscle.
True
Exam Q:
If maximum unassisted opening is 35, and maximum assisted opening is 33 mm, the exam was what?
Terminated
If you know you can’t open too wide, is it the muscle or the joint that’s the problem?
JOINT
How are lateral movements measured?
Between midlines
When you can’t open all the way.
Closed lock
When you can’t close all the way.
Open lock
These have no diagnostic input.
1) Pain with a click
2) Opening pattern
Minimum time needed to replicate a referral pattern.
5 seconds
Pain that goes beyond the area that you’re palpating.
Referred pain
Is TMJ imaging indicated for joint sounds?
No
T/F:
Condylar eccentricity is not a reliable indicator of the soft tissue status of the joint, especially bc the shape of the condylar head is not concentric to the shape of the fossa.
TRUE
Are condyles in a patient mirror images of each other?
No
Can pans be used for condylar position or function ?
No because the mandible is partly opened and protruded when the radiograph is taken.
Sensitivity of PANS for diagnosis of TMJ problems?
26%
What to look for around the condyle in a PAN.
Cortical plate
Hard or soft tissue is measured in an MRI?
SOFT
Views in an MRI
Sagittal or Coronal
The current gold standard of diagnostic imaging technology for soft tissues.
MRI
Reference line in reading MRI’s for TMD.
Posterior band of the articular disk.
This zone of the articular disc is always in contact with the condylar head.
Intermediate zone
The band is always at or behind what time, but never anterior to it?
11:30
Effusion of the TMJ
Swelling, inflammation and open bite.
Need these positions for an MRI.
Open and closed.
Relation of the condyle to the eminence when the mouth is open.
Down/anterior to the eminence.
Imaging used to assess hard tissue.
CT (Computed Tomography)
Imaging that CANNOT produce accurate images of the articular disc.
CT
Tells you how much you open the jaw, how fast the movement is, and if the movement deviates to the left or right.
Jaw tracking
Does jaw tracking have diagnostic validity?
No because there’s no differences between the jaw tracking of normal and TMD patients, and no difference in chewing patterns.
Records electrical activity of muscle.
Electromyography
Is there evidence to support the use of EMG for evaluation or diagnosis of TMD.
No.
EMG failed to discriminate between cases and controls.
Records and graphically displays sounds made by the TMJ, but cannot be used to diagnose TMD.
Sonography and Vibratography.
A device that senses and analyzes occlusal contact forces using paper-thin, disposable sensors.
Tells you which is the first contact, and which is the strongest contact.
T-Scan
